Northrop Grumman Aerospace Systems, Redondo Beach, California 90278, USA.
Opt Lett. 2012 Feb 15;37(4):455-7. doi: 10.1364/OL.37.000455.
We demonstrate a method for single-detector coherent sensing and automated coalignment of group delays in a coherently combined laser array, enabling robust coherent combining of broadband sources despite initial path mismatches exceeding the laser coherence length. The method is based on Fourier-domain filtering of the coherently combined laser beam to extract error signals, and it is equally applicable to controlling both spatial and temporal misalignments.
我们展示了一种在相干组合激光阵列中进行单探测器相干传感和群延迟自动准直的方法，即使初始路径失配超过激光相干长度，也能实现宽带光源的稳健相干组合。该方法基于对相干组合激光束进行傅里叶域滤波以提取误差信号，并且同样适用于控制空间和时间失配。
